Booster for siphons



i. CARROLL H. cass, or s'r. Louis country',

Patented @et EQ, 192.5.

N nuire-estaras PATENT orifice.

ANI) WILLIAMC. FARRAR, OF ST. LOUIS7 MISSOURI.

soos'rnn For; SrrHoNs.

Application filed May 12,

To all wlw/m, it may concern:

Be it known that we, CARROLL H.. CASE, a citizen of the United States,residing in the county of St. Louis and State of Missouri, and VILLiAMC. FARRAR, a citizen of the United States, residing in the city of St.Louis and Stateof Missouri, have invented a new and useful Improvementin Boosters for Siphons,of which the fcllowing is a full, clear, andexact Specification, reference being had to the accompanying drawings,which form a part thereof.

Our invention relates: to boosters to augment the flowof liquid throughsiphons and more particularly to boosters for Siphons used in liftingwater over Va levee or Similar elevation where the difference in'levelof water at the intake end of the Siphon and at the discharge endthereof is Small.` v Heretofore in operating a Siphon under Conditionswhere there is a small-diiference `in head the efficiency of the Siphonis so greatly impaired that such operation is vertually ineffectual.

Thek obiects of our invention are to provide means whereby the,eiiiciency of siphons operating under Such conditions will be greatlyincreased; to provide means for maintaining a flow of liquid through thedischarge end ofthe Siphon whereby the flow of liquid through Saidsiphonzwill be augiented; and Vto provide a booster which will not onlyincrease the flow of liquid through a Siphon operating under Small rdifference of head. but which will increase the volume of liquid passingthrough the Siphon at all times under any conditions.

Our invention is clearly shown in the accompanying drawing where similarletters are used to designate similar parts. The figure in the drawingshows a Siphon laid over an embankment such as a levee, or any Similarelevation.

Referring to the letters.i A is a Siphon laid over the levee B.V Theintake end C of the said Siphon being positioned in the Sump D fromwhich the`water is to be siphoned. The discharge end E of the Siphon isarranged with the check valve F which is preferably positioned away fromthe vertical., as shown.l so that its own weight will hold it againstthe mouth of the discharge end E, thereby allowing the discharge ofwater but preventing the inflow of water or air at said discharge end.The check valve 1921. SeralNo. 468,981.

F may be raised by the cord G, or any other means. At the highest point,preferably,` in the Siphon A is connected the air pump H whereby the airis drawn from said Siphon thereby creatin(r a vacuum whereby the Siphonmay be primed and may at all times be kept Yfree of air. I is anauxiliary water pipe through which water under pressure is Supplied bythe force pump K to the ejector nozzle l which is arranged in thedischarge leg of the Siphon5 preferably near the end thereof,'so as toaugment the flow of water therethrough. Water for the auxiliary pipe lmay be drawn through the pipe L by the pump K from the sump or anysuitable source of supply.

The operation of the Siphon and the nozzle is as follows: The checkvalve F is held by its own weight against the discharge end E thereb7preventing the inflow of air, and air is drawn from the Siphon by theair pumpl'l until avacuum is created in said Siphon-Strong enough tosuck water in at the intake mouth C and up to and past the highest pointof the Siphon A.. The flow of water down from the highest point of theSiphon to the discharge end then starts and kthe Siphon soon fills andthen operates. As

soon as the flow of Water through the Siphon commences the check valve Fis forced upwardly bv the pressure of the water or it may be lifted andheld in an upwardly po`sition by the cord G as described. The pump H isoperated to draw water through the tube L and force it through theauxiliary pipe I into the Siphon A through the ejector nozzle J. Theimpact due to the flow of water through the ejector nozzle J tends toaugment the flow of water through the discharge end E, thereby assuringa continued functioning of the Siphon even though the difference of headis Small. The air pump H is.y preferably. continued in operation tomaintain the Siphon free from air.

Successful and eicient operation of a Siphon necessitates themaintenance of the flow of liquid through the discharge leg of theSiphon.l and the flow through the discharge. leg creates a suction inthe Siphon whereby the inflow of liquid at the intake end of said Siphonis maintained. The suction created by the outflow of liquid through. thedischarge leg of the Siphon must be strong enough to overcome thefriction in the Siphon, and therefore there. must be a 11n dilicre-nceof level between that of the water in the Sump and that at the dischargeend suHicient to overcome the friction and create a How of water. InSiphons operating un-` der a small difference of head, the difference isoften too Small to maintain the Suction required for successfulpractical-operation.` Our invention provides for the maintenance of aflow of liquid inthe discharge leg of the Siphon which is at all timesmuch greater than the flowV due solely to the difference ot' the levelsof` water in the sump and in the river thereby assuring Succesfuloperation at all times.

The air pump H and the water pump K areshown diagrammatically Since wedo not Y wish to restrict ourselves to any particular type of either.

a source of Supply and place of discharge,

an' air' pump whereby Said siphon may be primed and maintained free ofair, and means wherebywater from said source of supply may be impelledinto said Siphon near the' discharge end thereof.

3. In combination with a Siphon having asourcc'of supply anda place/ofdischarge,

an air pump whereby said Siphon 'may be `primed and maintainedfreeofair, a force pumpdrawing water fromY said source of supply, and adischarge pipe'from said force pump Ventering said Siphon near thedischarge endl thereof whereby a iow of liquid may be maintained throughthe discharge end ofsaid Siphon.

4. In combination with a Siphon having a source of supply and place'ofdischarge, an air pumpfwherebyfsaid Siphon. may 'be primedand'maintained free of air, a force pumpdrawing water from said. sourceof supply, a-discharge pipe from Said Vforce pump entering said Siphonnear the discharge endthereof, and anxejeetorrnozzle attached `to. saidpipe and inside of said Siphon wheref by liquid may be impelledginto thedischarge leg of-'Said Siphon.

5. In combination with a siphon having a Source of supply and place ofdischarge, a

check valve at the discharge end thereoian airpump toy draw air rom saidSiphon, a force pump drawing water from said source of' Supply, adischarge pipe from saidforce pump entering said Siphonnear'tlie'discharge Tend thereof, land an ejector nozzle attached tosaidpipe and inside of'saidy Siphon` whereby liquid may be impelled intotheV discharge leg of Said`..siphon. f i In witness whereofwe havesignedour names to this'specic'ation.

cARRo-LL H. elisa; i

1 WILLIAM CJFARRAR. y'

